The brick kiln owners expressed reservation over the "undemocratic" way of sacking head of UP Unit of association K P Singh and appointing one Omveer Singh, a brick kiln owner in his place.
The discussion at the conference yesterday soon turned violent with the members exchanging blows and throwing chairs on rival members.
In the melee, two of the participants in the conference were injured and hospitalized.
BJP MP from Meerut Rajendra Kumar, who was present at the conference, disclosed that Union Environment Minister Prakash Javdekar has assured the brick-kiln and tiles manufacturers to make their industry exempted from environment clearances.
On being asked about the protest and clash at the conference, Sanjay Goel, spokesman of the All India Brick Kiln owners admitted that there were differences on the issue of Uttar Pradesh leadership but claimed that it was solved "in the house itself".